Source buffers may be killed, before reselected in the system browser -> clear the caches

[informatimago]

• select a function: the file is visited
• C-x C-k : kill the visited file buffer
• select the same function again:

Debugger entered--Lisp error: (error "Selecting deleted buffer")
  set-buffer(#<killed buffer>)
  (save-current-buffer (set-buffer esb:definition-buffer) (wlf:select esb:wm 'definition) (switch-to-buffer esb:definition-buffer nil t) (esb:set-definition-buffer-file file position))
  (if (and file position) (save-current-buffer (set-buffer esb:definition-buffer) (wlf:select esb:wm 'definition) (switch-to-buffer esb:definition-buffer nil t) (esb:set-definition-buffer-file file position)) (message "Definition source not found."))
  (let* ((definition-properties (slime-eval (list 'esb:serialize-for-emacs (cons definition-function (cons (list ... ...) '...))))) (source (find :source definition-properties :key 'car)) (file (and source (or (car (cdr (find :file ... :key ...))) (car (cdr (cdr ...)))))) (position (and source (or (car (cdr (find :position ... :key ...))) (car (cdr (find :offset ... :key ...))))))) (if (and file position) (save-current-buffer (set-buffer esb:definition-buffer) (wlf:select esb:wm 'definition) (switch-to-buffer esb:definition-buffer nil t) (esb:set-definition-buffer-file file position)) (message "Definition source not found.")))
  (let ((definition-type (cond ((string= category "functions") :function) ((string= category "variables") :variable) ((string= category "macros") :macro) ((string= category "classes") :class) ((string= category "generic functions") :generic-function) (t (error "Invalid category: %s" category)))) (definition-function (cond ((string= category "functions") 'def-properties:function-properties) ((string= category "variables") 'def-properties:variable-properties) ((string= category "macros") 'def-properties:macro-properties) ((string= category "classes") 'def-properties:class-properties) ((string= category "generic functions") 'def-properties:generic-function-properties) (t (error "Invalid category: %s" category))))) (let* ((definition-properties (slime-eval (list 'esb:serialize-for-emacs (cons definition-function (cons ... ...))))) (source (find :source definition-properties :key 'car)) (file (and source (or (car (cdr ...)) (car (cdr ...))))) (position (and source (or (car (cdr ...)) (car (cdr ...)))))) (if (and file position) (save-current-buffer (set-buffer esb:definition-buffer) (wlf:select esb:wm 'definition) (switch-to-buffer esb:definition-buffer nil t) (esb:set-definition-buffer-file file position)) (message "Definition source not found."))))
  esb:update-definition-buffer("COM.INFORMATIMAGO.COMMON-LISP.ARITHMETIC.ALGEBRA" "functions" "CARDANO")
  esb:select-definition("COM.INFORMATIMAGO.COMMON-LISP.ARITHMETIC.ALGEBRA" "functions" "CARDANO")
  (closure ((definition . "CARDANO") (--dolist-tail--) (category . "functions") (package . "COM.INFORMATIMAGO.COMMON-LISP.ARITHMETIC.ALGEBRA") esb:documentation-buffer esb:definitions-buffer esb:definitions-buffer esb:catgories-buffer esb:packages-buffer t) (btn) (esb:select-definition package category definition))(#<overlay from 11 to 18 in *esb-definitions*>)
  button-activate(#<overlay from 11 to 18 in *esb-definitions*> nil)
  push-button(11)
  funcall-interactively(push-button 11)
  call-interactively(push-button nil nil)
  command-execute(push-button)

[mmontone]

Are you sent to the Emacs debugger when one of these errors occur? Because I'm not, but I would like to. I just get the error message in Emacs status bar.

I have debug-on-error set to true, but the debugger does not appear when I run things from a command or interactively (it seems ...)

[informatimago]

For some reason, my debug-on-error was set to true, not to t. Perhaps only t is ignored from call-interactive, but other true values are not? I should reboot my emacs, there are strange things occuring. "Up 17d 13h 9m 28s (Tue 2021-07-13 12:03:11), 142 buffers, 42 files"
But I believe it should show the Backtrace when debug-on-error is true even for interactive calls.